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在分析具有均匀相位输出耦合器非稳腔优缺点的基础上，提出了一种改进型非稳腔。数值模拟结果表明这种非稳腔不仅克服了均匀相位输出耦合器非稳腔的缺点而且远场也有较好的聚焦能力。
Based on the analysis of the advantages and disadvantages of the unstable resonator with uniform phase output coupler, an improved unstable resonator is proposed. The numerical simulation results show that this unstable cavity not only overcomes the shortcomings of the unstable cavity of uniform phase output coupler but also has better focusing ability in the far field.